Target: `x86_64-unknown-dragonfly`, `x86_64-unknown-freebsd`, `x86_64-unknown-netbsd`, `x86_64-unknown-openbsd` API: [DragonFly](https://man.dragonflybsd.org/?command=strftime§ion=3), [FreeBSD](https://man.netbsd.org/strftime.3), [NetBSD](https://man.freebsd.org/strftime/3), [OpenBSD](https://man.openbsd.org/strftime.3) Implementation: [BSD 4.3 Reno](https://github.com/dspinellis/unix-history-repo/blob/BSD-4_3_Reno/usr/src/lib/libc/string/strftime.c) (historic), [DragonFly](https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/lib/libc/stdtime/strftime.c), [FreeBSD](https://github.com/freebsd/freebsd-src/blob/main/lib/libc/stdtime/strftime.c), [NetBSD](https://github.com/netbsd/src/blob/trunk/lib/libc/time/strftime.c), [OpenBSD](https://github.com/openbsd/src/blob/master/lib/libc/time/strftime.c) Test case: [graf](https://github.com/shua/graf/blob/v0.1.0/src/main.rs#L86), [niri](https://github.com/YaLTeR/niri/blob/v0.1.0-alpha.1/src/utils.rs#L44), [fish-shell](https://github.com/fish-shell/fish-shell/blob/0aa08cf267fe/fish-rust/src/history.rs#L1578) (without `bsd` workaround).
